If there's no date, they don't really have any value to collectors. So I'd put them at a solid 5 cents each.
Hi Linda Even though I agree that dateless buffalos have no Numismatic value, there are plenty of other uses that give them a bit more value than face,,there are folks who make Buttons and button covers from them also they are used in shadow box art among other things, I have seen them sell on ebay you might want to check on the finished auctions if you have a quanity of them . Rick
They are an inexpensive way to pique the interest of a young collector. Hand them out to a few of the neighbor kids, friend's kids or family members.